The residual effect of molybdenum fertilizer on a krasnozem on basalt at Maleny, south-east Queensland

Abstract

Five rates of molybdenum as molybdenum trioxide or calcium molybdate were applied, in three successive years, to a white clover pasture on a krasnozem on basalt, under an average annual rainfall of 1650 mm annum-1. Molybdenum deficiency was corrected initially by the lowest rate of 37 g Mo ha-1. The effectiveness of the lower rates (37 and 75 g Mo ha-1) declined with time, but an application of 150 g Mo ha-1 remained 90 per cent effective after five years.